Dispersant-assisted preparation of ultra-fine HfB2 powder

doi:10.1016/j.apsusc.2022.154995

	Dispersant-assisted preparation of ultra-fine HfB2 powder
	Wang, Tianxu 1,2; Wang, Zhen 2,3; Hu, Chenguang 2,3; Li, Xinyang 2,3; Huang, Zhulin 2,3; Hu, Xiaoye 2,3; Li, Yue 2,3
刊名	APPLIED SURFACE SCIENCE
	2022-12-30
卷号	606
关键词	HfB2 ceramic powder Co-precipitation Carbothermal reduction Dispersant
ISSN号	0169-4332
DOI	10.1016/j.apsusc.2022.154995
通讯作者	Li, Xinyang(xyli@issp.ac.cn) ; Huang, Zhulin(zlhuang@issp.ac.cn) ; Hu, Xiaoye(hxy821982@issp.ac.cn)
英文摘要	Hafnium boride (HfB2), as an ultra-high temperature ceramic, has been extensively employed in the aerospace field due to its high melting point and excellent ultrahigh-temperature oxidation resistance. Despite its outstanding performance, the development of the HfB2 for practical applications remained limited by its low -quality production including high oxygen content, large particle size and high agglomeration. In this work, a series of dispersants are adopted for reducing the particle size and suppressing the agglomeration of HfB2 powder during the liquid phase co-precipitation method combined with carbothermal reduction. Based on various characterizations, it is discovered that the presence of dispersants can greatly reduce the particle size and restrain the agglomeration of the HfB2. Specifically, the HfB2 prepared using polyethylene glycol (PEG) demonstrates an ultra-fine particle size down to hundreds of nanometers. To better understand the function of the dispersant, the formation of the HfB2 is unveiled via a combination of multiple characterizations. In detail, the dispersants can cap on the formed HfB2 and restrict their further growth and agglomeration during the reaction through the electrostatic repulsion and steric hindrance of high molecular polymer, thereby greatly improving the quality of HfB2 powder.
资助项目	Major science and technology project of Anhui Province ; Presidential Foundation of Hefei Institutes of Physical Science, CAS ; National Science Fund for Distinguished Young Scholars ; [008192841048] ; [BJPY2021B04] ; [YZJJ202202-CX] ; [51825103]
WOS关键词	HIGH-TEMPERATURE ; FORMATION MECHANISM ; ZRB2 ; CERAMICS ; NANOPARTICLES ; ZIRCONIUM ; OXIDATION
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000874534900001
资助机构	Major science and technology project of Anhui Province ; Presidential Foundation of Hefei Institutes of Physical Science, CAS ; National Science Fund for Distinguished Young Scholars
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130047]
专题	中国科学院合肥物质科学研究院
通讯作者	Li, Xinyang; Huang, Zhulin; Hu, Xiaoye
作者单位	1.Anhui Univ, Hefei 230039, Peoples R China 2.Chinese Acad Sci, Key Lab Mat Phys, Hefei 230031, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, HFIPS, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Wang, Tianxu,Wang, Zhen,Hu, Chenguang,et al. Dispersant-assisted preparation of ultra-fine HfB2 powder[J]. APPLIED SURFACE SCIENCE,2022,606.
APA	Wang, Tianxu.,Wang, Zhen.,Hu, Chenguang.,Li, Xinyang.,Huang, Zhulin.,...&Li, Yue.(2022).Dispersant-assisted preparation of ultra-fine HfB2 powder.APPLIED SURFACE SCIENCE,606.
MLA	Wang, Tianxu,et al."Dispersant-assisted preparation of ultra-fine HfB2 powder".APPLIED SURFACE SCIENCE 606(2022).